Do you really think that DHS is supposed to ignore a threat to the US? Space weather is not a new thing: See: https://www.dhs.gov/publicatio... . The Department of Commerce (i.e. NOAA) has been working on space weather for a long time. The Air Force has a whole group devoted to it. All these things have gone through the funding cycles and been part of the budget for a while. The executive order tells the different departments to coordinate and who does what to respond; this is all in implementation to a National Space Weather Strategy document which went through the normal cycle of drafting, public comments, and approval.
The idea that this came out of nowhere, is not funded, or is not part of the legally directed activities of the executive branch is just insane.